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An unflattering cloak that is not sexy in anyway.
That bum cloak is really ugly.
by Klauski Bunn May 18, 2011
A cloak worn by bums or hobos. Most notably by Aragorn in a brief clip of Fellowship of the Ring.
-Hey, did you see that guy's bum cloak?
-Yeah, what a fashionable hobo!
by Bumsly Adams February 21, 2011